During warmer parts of the day, fish will be found in deeper waters of a lake. Which statement best explains this phenomena with respect to the solubility of a gas?

Question

A
.

Gases are more soluble at low pressures.
B
.

Gases are more soluble at high pressures.
C
.

Gases are more soluble at low temperatures.
D
.

Gases are more soluble at high temperatures.

Answer 1

The statement that best explains why fish are found in deeper waters of a lake during warmer parts of the day is:

C. Gases are more soluble at low temperatures.

As water temperatures rise, the solubility of oxygen (a crucial gas for fish respiration) decreases. Therefore, fish may move to deeper, cooler waters where the oxygen levels are higher and more suitable for their survival.